Organic mixture, composition, organic electronic device and application

An organic mixture comprising a first organic compound and a second organic compound that forms an exciplex with the first organic compound, the first organic compound is an aromatic compound containing a triphenylboron heterocycle, the second organic compound is a compound containing an aromatic fused heterocycle, and LUMOH1 is defined as the lowest unoccupied molecular orbital energy level of the first organic compound, HOMOH1 is defined as the highest occupied molecular orbital energy level of the first organic compound, ET(H1) is defined as the triplet excited state energy level of the first organic compound, and LUMOH2 is defined as the lowest unoccupied molecular orbital energy level of the second organic compound, HOMOH2 is defined as the highest occupied molecular orbital energy level of the second organic compound, ET(H2) is defined as the triplet excited state energy level of the second organic compound, wherein, min((LUMOH1−HOMOH2, LUMOH2−HOMOH1)≤min(ET(H1), ET(H2))+0.1 eV.